Mine-drill support.



H. P. CORSA.

MINE DRILL SUPPORT.

APPLICATION FILED Nov. 1s, 191s.

1,125,480, Patented Jan. 19, 1915.

HOWARD 1. CORSA, 0F BINGHAIVI CANYON, UTAH.

MINE-DRILL sUPPoRT.

Specification of Letters Patent.

Patented Jan. 19, 1915.

Application filed November 18, 1913. Serial No. 801,679.

To all whom t may concern Be it known that I, HOWARD P. CORSA, a citizen of the United States, residing at Bingham Canyon, in the county of Salt Lake, Statel of Utah, have invented certain new and useful Improvements in Mine- Drill Supports; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will en'- vable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and usefulV improvements in drills and particularly rock drill supports for use in mines.

The present form of mine drill support rests on the Hoor of the tunnel and thus presents the disadvantage that the broken rock or as it is commonly called, muck, must be cleared away before the drill can be placed to drill holes for the nextcharge.

The object of the present invention therefore resides in the provision of a drill which can be so mounted in the tunnel that it is not necessary lirst to remove the muck, thus conducing to great economy in time, as the holes can be bored and the muck removed simultaneously.

A further object of the invention resides in the provision of such a drill support whereby when the support is once set, a full round of holes may be bored without necessitating resetting of the support.

A still further object of the invention resides in the provision of a support as above described which may be'readily and quickly set in place and which comprises a minimum number of parts so that it is durable in operation and may be manufactured at a comparatively low cost.

lVith these and other objects and advantages in view, the invention resides in the novel combination, formation and arrangement of parts to be more fully hereinafter described and illustrated in the accompanying drawings and particularly pointed out in the claims hereto appended.

Reference is had to the accompanying drawings wherein similar characters of reference designate corresponding parts throughout the several views, and in which:

Figure 1 is a side elevational view partly in section showing the drill support in position to drill a round of holes, Fig. 2 is an end view of whatiis shown in Fig. 1, Fig. 3 is a top plan view, Fig. l is a horizontal sectional view taken through the device, on the line 4 1 of Fig. l, Fig. 5 is a sectional view on the line 5-5 of Fig. 1, and Fig. 6 is a perspective view of the holding block for the drill carrying band.

Referring now more particularly to the drawings, the main bar 5 of the drill support is disposed horizontally in the shaft and comprises two telescoping sections 6 and 6. vIhreadedly connected and each carrying at its free end a shoe 8 adapted to engage the side wall of the tunnel. The section 6 is swiveled to its shoe 8 and 1s provided with transverse bores 7 whereby it may be rotated and forced against the wall to firmly support the bar.

A drill carrying bar 8 is provided which carries intermediate of its ends a transverse groove 9 adapted to seat the main bar 5. To hold the sections slidably in this groove a block l0 is provided and secured to the bar 8 by bolts 11. This bar 8 is hollow for a major portion of its length and is solid adjacent the groove 9. To clampingly lock this bar with relation to the main bar 5, the inner face of the block 10 is provided with a cutaway portion 11 in which seats a second block 13 having its inner face curved to engage the periphery of the bar 5 and a wedge 11 is passed through the block 10 and engages the block 13 to clamp it against the section 5 of the main bar.

Carried by one end portion of the bar 8 is a collar 15 to which is swivelly secured in the usual manner a drill 16.

To prevent the bar 8 from swinging away from the end wall of the tuimel when the drill is operated, a bar 17 is provided and secured to the other end portion of the bar 8 by a block 18 and bolts 19 passing through flanges on the block and the end of the bar 17, the lower end of the bar 8 seating in grooves cut in the block and said bar 17. The bar 17 is extensible for a major portion of its length and slidable therein is a bar 20. To clamp the bars together the free end of the bar 17 is split as at 21 and a U-bolt 22 is passed around the bar 17, with a block 23 disposed in its bight portion and bearing against the bar and a block 23 carried by its arms. A wedge member 9A; is provided having an inclined top face and stops 25 at each end thereof. Thus when the wedge member is driven in one direction it forces the split ends of the bars together to clamp the bar 20.

From the foregoing it will be observed that a structure has been provided whereby holes may be bored in any portion of the end wall. Vhile the muck is being removed, holes-in the top portion of the wall are being bored and when the muck Ahas been removed the block 13 is loosened and 1the bar 8 swung around so that the drill is below the main bar, the lower holes being then bored as desired.

What is claimed is:

1. A drill support comprising an eXten sible horizontal bar, a second bar, a block bolted to the second bar and slidably and pivotally holding it on the first, said block being provided with a cutaway portion adjacent the rst bar, a second block seated in said cutaway portion and adapted to engage the iirst bar and a means supported in the first block and engaging the second to force said second block against the bar.

2. A drill support comprising an extensible horizontal bar, a bar pivoted intermediate of its ends to the horizontal bar and slidable thereon, a drill carried by one end portion of the second bar, and an eXtensible bar securedto the other end of the second bar and disposed parallel to the drill.

In testimony whereof, affix my signature, in the presence of two witnesses.

HOWARD P. eoRsA.

Vitnesses:

G. B. CooNLnY, J. W. GRANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

